Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
7.3
Parallel Port
The LPC47M182 incorporates an IBM XT/AT compatible parallel port. This supports the optional PS/2
type bi-directional parallel port (SPP), the Enhanced Parallel Port (EPP) and the Extended Capabilities
Port (ECP) parallel port modes. Refer to the Configuration Registers for information on disabling, power
down, changing the base address of the parallel port, and selecting the mode of operation.
The Parallel Port configuration registers are summarized in Table 11.1 in Chapter 11 Configuration. The
Parallel Port logical device configuration registers (0xF0 and 0xF1) are defined in Table 11.11.
The parallel port also incorporates SMSC’s ChiProtect circuitry, which prevents possible damage to the
parallel port due to printer power-up.
The functionality of the Parallel Port is achieved through the use of eight addressable ports, with their
associated registers and control gating. The control and data port are read/write by the CPU, the status
port is read/write in the EPP mode. The address map of the Parallel Port is shown below:
DATA PORT
BASE ADDRESS + 00H
BASE ADDRESS + 01H
BASE ADDRESS + 02H
BASE ADDRESS + 03H
EPP DATA PORT 0 BASE ADDRESS + 04H
EPP DATA PORT 1 BASE ADDRESS + 05H
EPP DATA PORT 2 BASE ADDRESS + 06H
EPP DATA PORT 3 BASE ADDRESS + 07H
STATUS PORT
CONTROL PORT
EPP ADDR PORT
The bit map of these registers is:
D0
PD0
TMOUT
D1
PD1
0
D2
PD2
0
D3
PD3
nERR
D4
PD4
SLCT
D5
PD5
PE
D6
PD6
nACK nBUSY
D7
PD7
NOTE
1
1
DATA PORT
STATUS
PORT
CONTROL
PORT
STROBE AUTOFD nINIT
SLC
PD3
PD3
PD3
PD3
PD3
IRQE
PD4
PD4
PD4
PD4
PD4
PCD
PD5
PD5
PD5
PD5
PD5
0
0
1
2
2
2
2
2
EPP ADDR
PD0
PD0
PD0
PD0
PD0
PD1
PD1
PD1
PD1
PD1
PD2
PD2
PD2
PD2
PD2
PD6
PD6
PD6
PD6
PD6
PD7
PD7
PD7
PD7
PD7
PORT
EPP DATA
PORT 0
EPP DATA
PORT 1
EPP DATA
PORT 2
EPP DATA
PORT 3
Note 1: These registers are available in all modes.
Note 2: These registers are only available in EPP mode.
SMSC LPC47M182
95
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
DATASHEET
SMSC [ SMSC CORPORATION ]
